Linux Boot Hosed -- How Do I Fix?

[Ed Sutherland]

In an effort to fix the Gnome time-adjust bug (the one where Gnome 
always says it cannot find the tool to adjust time/date), I used 
Gnome-System-Tools. After rebooting, at the second stage of yaboot 
(where YDL is supposed to load), I get the Apple OpenFirmware screen 
with an error, followed by my keyboard locking-up. The only alternative 
is booting into OSX.

How do I fix it so I can boot into my Linux partition, again? (I've 
already tried option-reboot and booting through OF without luck.) 
Thanks.

Ed

P.S. -- What *is* the solution for PPC users with the Gnome date adjust 
bug?